Snakes on a staff

The sideways aisles have aisle markers, but lack any sort of aisle designations -- normally Albertsons uses letters for these aisles. It's interesting how this decor extensively uses the caduceus symbol (it took a lot of searching with various random terms to figure out that that was its name!) instead of the far-more-common mortar-and-pestle or ℞ icons for the pharmacy. I suspect this symbol isn't particularly popular because some people really don't like snakes, plus apparently this isn't even the correct snake-stick icon for doctors!